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单词 thulium
释义

Definition of thulium in English:

thulium

noun ˈθ(j)uːlɪəmˈθ(j)uliəm
mass noun
  • The chemical element of atomic number 69, a soft silvery-white metal of the lanthanide series.

    (化学元素)铥(符号: Tm

    Example sentencesExamples
    • Each segment contains small amounts of ions of relatively rare metals, such as dysprosium, thulium, and cerium, which fluoresce in different colors.
    • The thulium material never recovers from the upwards resistive change, and continues recovery to the normal state as the compound is further cooled.
    • The main rare-earth ions used are thulium (for devices operating at 1450 to 1510 nm) and erbium.
    • The pure metal can be produced by treating thulium fluoride with calcium metal.
    • The American chemist C. James performed 15,000 recrystallizations before pure thulium bromate was obtained.

Origin

Late 19th century: modern Latin, from Latin Thule (see Thule (sense 1)), from Greek Thoulē, of unknown origin.

Definition of thulium in US English:

thulium

nounˈθ(j)uliəmˈTH(y)o͞olēəm
  • The chemical element of atomic number 69, a soft silvery-white metal of the lanthanide series.

    (化学元素)铥(符号: Tm

    Example sentencesExamples
    • The thulium material never recovers from the upwards resistive change, and continues recovery to the normal state as the compound is further cooled.
    • The main rare-earth ions used are thulium (for devices operating at 1450 to 1510 nm) and erbium.
    • The pure metal can be produced by treating thulium fluoride with calcium metal.
    • Each segment contains small amounts of ions of relatively rare metals, such as dysprosium, thulium, and cerium, which fluoresce in different colors.
    • The American chemist C. James performed 15,000 recrystallizations before pure thulium bromate was obtained.

Origin

Late 19th century: modern Latin, from Latin Thule (see Thule (sense 1)), from Greek Thoulē, of unknown origin.

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更新时间:2025/6/20 7:44:44